Checkpoint64 has a preset for Hell Let Loose: it already knows where the config folder is, backs it up automatically and keeps every version. Everything this site has on Hell Let Loose:
Hell Let Loose
-
Config file location
Windows:
%LOCALAPPDATA%\HLL\Saved\Config\WindowsNoEditor -
Backup guide
Competitive games keep your progress on their servers — what's on your disk is the config. Checkpoint64 versions the settings folder for 67 games and 16 dedicated servers, so a reinstall or a file verification can't cost you your binds. Free download.